Frequently asked questions 


We are here to help

I am afraid of pain - how reliable is the anesthetic injection?

The modern anesthetics are very safe, free of side effects, and can be adapted individually. Depending on the type of procedure, different anesthetics are used: infiltration anesthesia, which numbs a specific area in the mouth, and mandibular block anesthesia, which anesthetizes an entire nerve area.

And what if I am afraid of the injection itself?

Don’t worry! Local surface anesthetic numbs the tissue before the actual injection. We apply a gel to the gum, then we do the injection completely pain-free, often in two separate injections.

Is it normal for some teeth to become wobbly with increasing age?

No. A loose tooth is always an alarm signal: It is caused by a reduction of the tooth sustaining bone caused by periodontitis, i.e. bacterial inflammation. Modern dentistry has successful methods to stop this inflammation and thus to prevent tooth loss.

What happens when teeth become longer and longer?

The teeth only seem to get longer and longer – in fact, the gums retract further and further, until at some point the tooth becomes loose. The reason is periodontitis, i.e. bacterial inflammation of the tissue holding the tooth. A professional therapy can save you from tooth loss.

A little gum bleeding - isn't that normal?

No, not even when brushing your teeth. This should be the reason for a dental appointment, because it means that the gums are no longer healthy. Early professional therapy can reliably stop the incipient inflammation and thus prevent periodontitis.

Is it true that amalgam fillings are bad for your health?

Amalgam contains up to 50% mercury. Concerns have been raised about the potential for mercury poisoning with amalgam when used in dental fillings. There has been no scientific evidence of a general risk from amalgam. Nevertheless, there may be problems in individual cases. Today, these fillings are often replaced by modern materials such as composite or ceramics – which are safer and more aesthetic. We do not do amalgam fillings in our clinic.

I have heard so much about veneers. What exactly are they?

Veneers are super thin ceramic shells. They can easily correct broken edges, unaligned teeth, gaps and discolorations. Sometimes veneers do not require tooth reduction, in other cases a thin layer of 0.5 to 0.7 millimetres is removed. The veneers are put on adhesively – for a perfect fit, color and shape.

Is it always necessary to remove wisdom teeth?

Yes and No. Whenever they cause problems, they need to be removed. This is usually the case. Wisdom teeth erupt between the age of 16 and 20, but many people do not have enough space in the jaw bone for them fit correctly in the dental arch. This results in various problems during tooth eruption or the displacement of wisdom teeth. Possible consequences: Inflammations – in the worst case abscesses, cysts in the jaw bone, damage of adjacent  teeth or displacement of other teeth.

Where does tooth grinding come from?

There are many causes for nocturnal tooth grinding. Mental stress and incorrect tooth contact points are the main causes. During grinding, the teeth are pressed or rubbed against each other. Consequences: Your teeth abrade and masticatory muscles, jaw joint and tooth position can change, the masticatory muscles become even more tense. If you grind your teeth, you should always consult a dentist. Misaligned teeth or poorly fitting fillings or crowns could also be the reason for grinding. Depending on the diagnosis, we can balance your masticatory system with a custom-made splint and in some cases physiotherapy/osteopathy. In case of mental stress, a psychological consultation may be necessary.

Can the success of dental implants be guaranteed?

No, even the most experienced implantologist cannot guarantee this. The patient’s lifestyle, general health and correct oral hygiene always play a role. However, various studies show that after ten years, 95 to 98 percent of implants are still in place and do not cause problems. This is by far the best prognosis for dental prostheses.


+34 913 503 348


C/ Francisco Suárez, 23, bajo, 28036 Madrid

Opening hours

Mo-Thu  9:00 – 18:30h

Fr  9:00 – 14:00h


Your German dental practice in Madrid

© 2019 Knobel Dental for Dr. Alexander Knobel. All Rights Reserved.